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Income Taxes (Details) - USD ($)
Jun. 30, 2016
Jun. 30, 2015
Deferred tax assets:    
Net operating loss and credit carryforwards $ 32,440,000 $ 33,279,000
Intangible assets   6,000
Stock-based compensation 813,000  
Capital loss and R&D credits 1,517,000 1,500,000
Research development expenses 576,000 657,000
Inventory 177,000 135,000
Accrued expenses and other 492,000 306,000
Gross deferred tax assets 36,015,000 35,883,000
Valuation allowance for deferred tax assets (35,971,000) (35,789,000)
Total deferred tax assets 44,000 94,000
Deferred tax liabilities:    
Depreciation and other (44,000) (94,000)
Total deferred tax liabilities (44,000) (94,000)
Net deferred tax liability